Header Compression Channel QoS Indication
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently propagating Quality of Service (QoS) information within the header compression channel, limiting the ability to enforce flexible QoS requirements due to the separation of functions across different physical nodes and interference between encryption and header compression processes.
Innovation Solution
The method involves deriving and including Quality of Service (QoS) information in the header compression channel by processing packets with associated QoS requirements, using this information to perform intermediate node functions such as queue management and scheduling, and propagating it through the network to enable more flexible QoS enforcement at a finer granularity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If QoS information is propagated through separate signaling channels, then QoS enforcement is possible, but system complexity increases and bandwidth efficiency decreases
Solution Approach 1:
The patent merges QoS information propagation with the existing header compression channel by embedding QoS indicators within compressed packet headers. This integration eliminates the need for separate QoS signaling channels, reducing system complexity while maintaining QoS enforcement capability. The compressed headers carry both data information and QoS indicators together, achieving functional consolidation.
Solution Approach 2:
The header compression channel is enhanced to serve multiple functions simultaneously: it continues to compress packet headers for bandwidth efficiency while also propagating QoS information for service differentiation. This multi-functionality allows the same channel to handle both data optimization and QoS management, reducing the need for additional dedicated signaling infrastructure.
2Productivity
If header compression is applied to reduce bandwidth usage, then bandwidth efficiency improves, but QoS information propagation becomes limited
Solution Approach 1:
The patent applies different compression strategies to different parts of the packet header based on their characteristics. Static fields that don't change frequently are compressed with higher aggregation, while dynamic fields including QoS indicators are preserved with more detail. This localized quality approach ensures that QoS information is adequately propagated while maintaining overall bandwidth efficiency.
Solution Approach 2:
The patent modifies the compressed header format to include specific QoS indicator parameters that are preserved or enhanced during compression. By changing the parameter representation in the compressed header to explicitly include QoS fields, the system maintains QoS information propagation capability while still achieving bandwidth compression through other header fields.
3Reliability
If encryption is applied to secure data transmission, then security is improved, but QoS information extraction becomes difficult
Solution Approach 1:
The patent performs QoS information extraction and processing before the encryption step in the packet handling pipeline. By extracting QoS indicators from the packet header prior to encryption, the system obtains the necessary QoS information in plaintext form while the payload remains encrypted. This preliminary action resolves the conflict between security and QoS information accessibility.
Solution Approach 2:
The patent segments the packet processing into distinct functional stages: header parsing, QoS information extraction, compression, and finally encryption. This segmentation allows QoS information to be extracted and processed separately from the encrypted payload, maintaining both security and QoS capability without interference between these functions.
Data Source
AI summary
Quality of service information (QoSI) is included with a compressed header of a data packet and can be utilized by nodes supporting the header compression channel to perform QoS enforcements at a sub-flow granularity level. A basic mode of a method comprises (1) processing a packet using a process having a process-associated quality of service requirement to form a processed packet, and (2) including, with a compressed header for the processed packet, the header-included quality of service information which is derived using information indicative of the process-associated quality of service requirement. In another mode the header-included quality of service information is derived both from the process-associated quality of service requirement and quality of service information extracted from the received packet.